Gas path system for solid oxide battery SOC (State of Charge) test board

Abstract

The utility model relates to the technical field of electrochemical testing, in particular to a gas circuit system for a solid oxide battery SOC (State of Charge) testboard. An oxygen electrode preheater is mounted on the oxygen electrode gas inlet pipeline; the hydrogen electrode gas inlet pipeline is divided into a gas inlet pipeline and a liquid water inlet pipeline, and the liquid water inlet pipeline and the gas inlet part are arranged in parallel; the mixing tank is mounted on the hydrogen electrode gas inlet pipeline, the gas inlet pipeline and the liquid water inlet pipeline are respectively connected with the mixing tank, and the hydrogen electrode preheater is mounted on a pipeline for connecting the mixing tank and the galvanic pile; an oxygen electrode condensation water segregator is mounted on the oxygen electrode gas outlet pipeline; a hydrogen electrode condensation water segregator is mounted on the oxygen electrode gas outlet pipeline, and a steam-water separator is mounted on a pipeline at the gas outlet end of the hydrogen electrode condensation water segregator; and the cooling-water machine is respectively connected with the oxygen electrode condensation water segregator and the hydrogen electrode condensation water segregator. A gas path system is optimized, the temperature, humidity, gas and the like of a test environment are accurately controlled, the automation degree is high, and therefore the accuracy and repeatability of a test result are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electrochemistry test, especially a gas path system for solid oxide cell SOC test platform. BACKGROUND

[0002] Solid oxide cell (SOC) is a device that directly converts chemical energy into electrical energy, which mainly includes solid electrolyte and metal anode, cathode and other components. SOC has the advantages of high energy conversion efficiency, wide fuel adaptability, environmental friendliness and is widely used in power generation, energy storage and other fields. However, the performance and life of SOC are affected by many factors, such as the ion conduction performance of electrolyte, the catalytic activity of electrode material, the working temperature, etc. Therefore, accurate testing and analysis of SOC, evaluation of its performance and life, are of great significance to promote the application and development of SOC technology.

[0003] The existing gas path system is responsible for providing gas supply, temperature control and other functions required for testing, but the existing gas path module structure is complex, inconvenient to maintain and operate, and the degree of automation is not high, the testing precision and the reliability of the measurement results are affected to a certain extent. SUMMARY

[0004] The technical problem to be solved by the utility model is: in order to solve the problems of the prior art in the above background technology, provide a gas path system for solid oxide cell SOC test platform, which solves the problem of unable to accurately control the test temperature, humidity and gas in the test process of the existing test platform.

[0005] The technical scheme adopted by the utility model to solve its technical problems is: a gas path system for solid oxide cell SOC test platform, comprising a stack, an oxygen electrode gas inlet pipe is installed on the stack and is in communication with air, an oxygen electrode preheater is installed on the oxygen electrode gas inlet pipe;

[0006] A hydrogen electrode gas inlet pipe is divided into a gas inlet pipe and a liquid water inlet pipe, the gas inlet pipe includes a hydrogen gas inlet pipe, a nitrogen gas inlet pipe, a hydrogen-nitrogen mixed gas inlet pipe and a methane gas inlet pipe, and the liquid water inlet pipe is arranged parallel to the gas inlet part;

[0007] A mixing tank is installed on the hydrogen electrode gas inlet pipe, the gas inlet pipe and the liquid water inlet pipe are connected with the mixing tank respectively, and a hydrogen electrode preheater is installed on the pipeline connecting the mixing tank with the stack;

[0008] An oxygen electrode gas outlet pipe, the gas outlet end of the oxygen electrode gas outlet pipe is in communication with air, and an oxygen electrode condensation water separator is installed on the oxygen electrode gas outlet pipe;

[0009] The hydrogen electrode exhaust pipe is connected with the air and the wastewater collecting pipe respectively, the hydrogen electrode condensing water separator is installed on the hydrogen electrode exhaust pipe, and the steam separator is installed on the pipeline of the hydrogen electrode condensing water separator.

[0010] The water chiller is connected with the oxygen electrode condensing water separator and the hydrogen electrode condensing water separator respectively.

[0011] Further, the pipeline between the air inlet end of the oxygen electrode gas inlet pipe and the oxygen electrode preheater is sequentially provided with the air filter, the air pressure reducing valve, the air pressure reducing pressure gauge, the air electromagnetic valve, the air check valve, the oxygen electrode cold end pressure sensor and the oxygen electrode unloading valve.

[0012] Further, the pipeline between the water inlet end of the liquid inlet pipe and the water chiller is sequentially provided with the pure water preparation machine, the pure water inlet tank, the water pump, the water vapor generator and the water vapor check valve.

[0013] Further, the pipeline between the hydrogen gas inlet end of the hydrogen gas inlet pipe and the hydrogen gas cylinder is sequentially provided with the hydrogen gas filter, the hydrogen gas pressure reducing valve, the hydrogen gas pressure reducing pressure gauge, the hydrogen gas electromagnetic valve, the hydrogen gas check valve and the hydrogen gas mass flow meter.

[0014] Further, the pipeline between the nitrogen gas inlet end of the nitrogen gas inlet pipe and the nitrogen gas cylinder is sequentially provided with the nitrogen gas filter, the nitrogen gas pressure reducing valve, the nitrogen gas pressure reducing pressure gauge, the nitrogen gas electromagnetic valve, the nitrogen gas check valve and the nitrogen gas mass flow meter.

[0015] Further, the pipeline between the hydrogen-nitrogen mixed gas inlet end of the hydrogen-nitrogen mixed gas inlet pipe and the hydrogen-nitrogen mixed gas cylinder is sequentially provided with the hydrogen-nitrogen mixed gas filter, the hydrogen-nitrogen mixed gas pressure reducing valve, the hydrogen-nitrogen mixed gas pressure reducing pressure gauge, the hydrogen-nitrogen mixed gas electromagnetic valve, the hydrogen-nitrogen mixed gas check valve and the hydrogen-nitrogen mixed gas mass flow meter.

[0016] Further, the pipeline between the methane inlet end of the methane inlet pipe and the methane cylinder is sequentially provided with the methane filter, the methane pressure reducing valve, the methane pressure reducing pressure gauge, the methane electromagnetic valve, the methane check valve and the methane mass flow meter.

[0017] Further, the hydrogen electrode hot end inlet pressure sensor is installed on the pipeline between the hydrogen electrode condensing water separator and the hydrogen electrode hot end, the hydrogen electrode tail gas cooling outlet temperature sensor is installed on the pipeline between the hydrogen electrode condensing water separator and the steam separator, one end of the steam separator is connected with the air through the pipeline, one end of the steam separator is connected with the wastewater collecting tank through the pipeline, and the wastewater collecting tank is discharged through the wastewater collecting pipe.

[0018] Further, an oxygen electrode hot end inlet pressure sensor is installed on the pipeline between the stack and the oxygen electrode condensing water trap, and an oxygen electrode tail gas cooling outlet temperature sensor is installed on the exhaust pipeline of the oxygen electrode condensing water trap.

[0019] Further, a hydrogen electrode cold end pressure sensor is installed on the pipeline connected between the mixing tank and the gas inlet pipeline, and a hydrogen electrode unloading valve is installed on the pipeline connected between the mixing tank and the hydrogen electrode cold end pressure sensor and the hydrogen electrode gas outlet pipeline.

[0020] The utility model discloses the beneficial effect: the utility model discloses the optimization gas circuit system, can accurate control test environment's temperature, humidity, gas etc., the degree of automation is high, thereby improved the accuracy and repeatability of test result, solved the problem that the existing test platform cannot accurate control test temperature, humidity, gas in the test process. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model is further described below in connection with the drawings and examples.

[0022] Fig. 1 It is the gas circuit principle diagram of the utility model;

[0023] Fig. 2 It is the process pipeline instrument flow chart of the utility model;

[0024] In the drawing: F101. hydrogen filter, F201. nitrogen filter, F301. hydrogen nitrogen mixed gas filter, F401. methane filter, F601. air filter,

[0025] RV101. hydrogen pressure reducing valve, RV201. nitrogen pressure reducing valve, RV301. hydrogen nitrogen mixed gas pressure reducing valve, RV401. methane pressure reducing valve, RV601. air pressure reducing valve,

[0026] PMP101. hydrogen pressure reducing pressure gauge, PMP201. nitrogen pressure reducing pressure gauge, PMP301. hydrogen nitrogen mixed gas pressure reducing pressure gauge, PMP401. methane pressure reducing pressure gauge, PMP601. air pressure reducing pressure gauge,

[0027] S101. hydrogen solenoid valve, S201. nitrogen solenoid valve, S301. hydrogen nitrogen mixed gas solenoid valve, S401. methane solenoid valve, S601. air solenoid valve,

[0028] H101. hydrogen check valve, H201. nitrogen check valve, H301. hydrogen nitrogen mixed gas check valve, H401. methane check valve, H501. water vapor check valve, H601. air check valve,

[0029] TU101. Hydrogen mass flow meter, TU201. Nitrogen mass flow meter, TU301. Hydrogen-nitrogen mixed gas mass flow meter, TU401. Methane mass flow meter, TU601. Air mass flow meter,

[0030] P101. Hydrogen electrode cold end pressure sensor, P102. Hydrogen electrode hot end inlet pressure sensor, P103. Hydrogen electrode hot end inlet pressure sensor, P601. Oxygen electrode cold end pressure sensor, P602. Oxygen electrode hot end inlet pressure sensor, P603. Oxygen electrode hot end inlet pressure sensor,

[0031] HP101. Hydrogen electrode unloading valve, HP102. Hydrogen electrode preheater, HP104. Hydrogen electrode preheater, HP601. Oxygen electrode unloading valve, HP602. Oxygen electrode preheater,

[0032] SQ501. Pure water feeding tank, M501. Water pumping pump, H20-101. Waste water collecting tank, H20-501. Water vapor generator, H501. Water vapor one-way valve, D101. Electrode stack, JEA101. Chiller, HQ101. Water vapor separator,

[0033] LQ101. Hydrogen electrode condensate water separator, LQ601. Oxygen electrode condensate water separator,

[0034] T106. Hydrogen electrode tail gas cooling outlet temperature sensor, T603. Oxygen electrode tail gas cooling outlet temperature sensor. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.

[0036] As Figs. 1-2 The gas path system for the solid oxide cell SOC test bench shown in the figure comprises an electrode stack D101, the electrode stack D101 is a test product, the electrode stack has an electrode stack positive electrode and an electrode stack negative electrode, and the electrode stack D101 is provided with

[0037] An oxygen electrode gas inlet pipeline is in communication with air, and the oxygen electrode gas inlet pipeline is provided with an oxygen electrode preheater HP602;

[0038] The hydrogen electrode gas inlet pipeline is provided with a hydrogen electrode hot end inlet pressure sensor P102 installed on the pipeline between the hydrogen electrode preheater HP102 and the stack D101. The hydrogen electrode preheater HP102 is provided with a temperature sensor. An outlet temperature sensor is installed on the outlet pipeline of the hydrogen electrode preheater HP102. The hydrogen electrode gas inlet pipeline is divided into a gas inlet pipeline and a liquid water inlet pipeline. The gas inlet pipeline includes a hydrogen gas inlet pipeline, a nitrogen gas inlet pipeline, a hydrogen-nitrogen mixed gas inlet pipeline and a methane gas inlet pipeline. The liquid water inlet pipeline is arranged in parallel with the gas inlet pipeline.

[0039] The mixed tank HH101 is installed on the hydrogen electrode gas inlet pipeline and is used for uniformly mixing the gas and water vapor. The gas inlet pipeline and the liquid water inlet pipeline are respectively connected with the mixed tank HH101. The hydrogen electrode preheater HP102 is installed on the pipeline connecting the mixed tank HH101 with the stack D101. The pipeline from the outlet of the hydrogen electrode preheater HP102 to the stack and the pipeline from the outlet of the oxygen electrode preheater HP602 to the stack are wound with a heat tracing belt to reduce the temperature drop of the preheated gas.

[0040] The oxygen electrode gas outlet pipeline is connected with the air at the gas outlet end. The oxygen electrode gas outlet pipeline is provided with an oxygen electrode condensate water separator LQ601.

[0041] The hydrogen electrode gas outlet pipeline is connected with the air and the waste water collection pipeline at the gas outlet end. The hydrogen electrode gas outlet pipeline is provided with a hydrogen electrode condensate water separator LQ101. The pipeline at the gas outlet end of the hydrogen electrode condensate water separator LQ101 is provided with a steam-water separator HQ101.

[0042] The water chiller JEA101 is used for cooling the gas and is respectively connected with the oxygen electrode condensate water separator LQ601 and the hydrogen electrode condensate water separator LQ101.

[0043] The pipeline between the gas inlet end of the oxygen electrode gas inlet pipeline and the oxygen electrode preheater HP602 is sequentially provided with an air filter F601, an air pressure reducing valve RV601, an air pressure reducing pressure gauge PMP601, an air electromagnetic valve S601, an air check valve H601, an oxygen electrode cold end pressure sensor P601 and an oxygen electrode unloading valve HP601. The oxygen electrode unloading valve HP601 is used for adjusting the gas pressure to avoid the damage of the stack D101 caused by the excessively high gas pressure.

[0044] The pipeline between the stack D101 and the oxygen electrode preheater HP602 is provided with an oxygen electrode hot end inlet pressure sensor P602. The oxygen electrode hot end inlet pressure sensor P602 is used for monitoring the pipeline pressure before the oxygen electrode gas enters the stack.

[0045] A temperature sensor is installed on the oxygen electrode preheater HP602, and an outlet temperature sensor is installed on the outlet pipeline of the oxygen electrode preheater HP602

[0046] A pure water preparation machine is installed on the water inlet end of the liquid water inlet pipeline, and a pure water inlet tank SQ501, a water pump M501, a water vapor generator H20-501, and a water vapor check valve H501 are sequentially installed on the pipeline between the pure water preparation machine and the mixing tank HH101. The pure water inlet tank SQ501, the water pump M501, and the water vapor generator H20-501 are all fixed on the rack by fasteners. The water vapor check valve H501 functions as a check valve that automatically opens and closes the valve flap depending on the flow of water vapor itself. When water vapor flows in the forward direction, the valve flap opens, and the gas passes through. When water vapor flows in the reverse direction, the valve flap closes, preventing water vapor from flowing backward and preventing gas in the hydrogen electrode from flowing back into the water vapor generator. A heat tracing band is provided on the pipeline at the outlet of the water vapor generator H20-501 to prevent water vapor from condensing.

[0047] The gas inlet end of the hydrogen gas inlet pipeline is in communication with a hydrogen gas cylinder, and a hydrogen gas filter F101, a hydrogen gas pressure reducing valve RV101, a hydrogen gas pressure reducing pressure gauge PMP101, a hydrogen gas solenoid valve S101, a hydrogen gas check valve H101, and a hydrogen gas mass flow meter TU101 are sequentially installed on the pipeline between the hydrogen gas cylinder and the mixing tank HH101.

[0048] The gas inlet end of the nitrogen gas inlet pipeline is in communication with a nitrogen gas cylinder, and a nitrogen gas filter F201, a nitrogen gas pressure reducing valve RV201, a nitrogen gas pressure reducing pressure gauge PMP20, a nitrogen gas solenoid valve S201, a nitrogen gas check valve H201, and a nitrogen gas mass flow meter TU201 are sequentially installed on the pipeline between the nitrogen gas cylinder and the mixing tank HH101.

[0049] The gas inlet end of the hydrogen-nitrogen mixed gas inlet pipeline is in communication with a hydrogen-nitrogen mixed gas cylinder, and a hydrogen-nitrogen mixed gas filter F301, a hydrogen-nitrogen mixed gas pressure reducing valve RV301, a hydrogen-nitrogen mixed gas pressure reducing pressure gauge PMP301, a hydrogen-nitrogen mixed gas solenoid valve S301, a hydrogen-nitrogen mixed gas check valve H301, and a hydrogen-nitrogen mixed gas mass flow meter TU301 are sequentially installed on the pipeline between the hydrogen-nitrogen mixed gas cylinder and the mixing tank HH101.

[0050] The gas inlet end of the methane inlet pipeline is in communication with a methane cylinder, and a methane filter F401, a methane pressure reducing valve RV401, a methane pressure reducing pressure gauge PMP401, a methane solenoid valve S401, a methane check valve H401, and a methane mass flow meter TU401 are sequentially installed on the pipeline between the methane cylinder and the mixing tank HH101.

[0051] The hydrogen electrode hot end inlet pressure sensor P103 is installed on the pipeline between the stack D101 and the hydrogen electrode condensate trap LQ101. The hydrogen electrode hot end inlet pressure sensor P103 monitors the pressure of the pipeline at the outlet of the hydrogen electrode gas stack. The hydrogen electrode tail gas cooling outlet temperature sensor T106 is installed on the pipeline between the hydrogen electrode condensate trap LQ101 and the steam-water separator HQ101. One end of the steam-water separator HQ101 is connected to the pipeline for discharging hydrogen into the air. The other end of the steam-water separator HQ101 is connected to the waste water collection tank H20-101 through a pipeline. The waste water collection tank H20-101 is connected to the waste water collection pipeline.

[0052] The hydrogen electrode condensate trap LQ101 is used to separate water in the pipeline. The water in the water pipeline is collected and treated by the waste water collection tank.

[0053] After the gas is cooled by the cold water trap in the pipeline, the hydrogen electrode tail gas cooling outlet temperature sensor T106 and the oxygen electrode tail gas cooling outlet temperature sensor T603 are used to monitor the temperature of the tail gas in the pipeline.

[0054] The hydrogen electrode cold end pressure sensor P101 is installed on the pipeline connected between the mixing tank HH101 and the gas inlet pipeline. The hydrogen electrode cold end pressure sensor P101 is used to monitor the pressure in the pipeline. The pipeline between the mixing tank HH101 and the hydrogen electrode cold end pressure sensor P101 is connected to the hydrogen electrode gas outlet pipeline through a pipeline. The hydrogen electrode unloading valve HP101 is installed on the pipeline. The hydrogen electrode unloading valve HP101 adjusts the pressure of the gas to prevent the pressure of the gas from being too high and causing damage to the stack D101.

[0055] The hydrogen gas filter F101, the nitrogen gas filter F201, the hydrogen-nitrogen mixed gas filter F301, the methane filter F401, and the air filter F601 are used to filter out impurities in the gas.

[0056] The hydrogen gas pressure reducing valve RV101, the nitrogen gas pressure reducing valve RV201, the hydrogen-nitrogen mixed gas pressure reducing valve RV301, the methane pressure reducing valve RV401, and the air pressure reducing valve RV601 are used to reduce the pressure of the gas to obtain a suitable pressure value for testing the product.

[0057] The hydrogen decompression pressure gauge PMP101, the nitrogen decompression pressure gauge PMP20, the hydrogen-nitrogen mixed gas decompression pressure gauge PMP301, the methane decompression pressure gauge PMP401 and the air decompression pressure gauge PMP601 are used for monitoring the pressure after the decompression of the decompression valve. The hydrogen solenoid valve S101, the nitrogen solenoid valve S201, the hydrogen-nitrogen mixed gas solenoid valve S301, the methane solenoid valve S401 and the air solenoid valve S601 are normally closed solenoid valves, and the solenoid valve coils are not powered, so that the solenoid valves are in the closed state; the solenoid valve coils are powered, so that the solenoid valves are in the open state.

[0058] The hydrogen one-way valve H101, the nitrogen one-way valve H201, the hydrogen-nitrogen mixed gas one-way valve H301, the methane one-way valve H401 and the air one-way valve H601 are used for automatically opening and closing the valve disc by relying on the flow of the gas itself. When the gas flows in the positive direction, the valve disc is opened, and the gas passes through; when the gas flows in the reverse direction, the valve disc is closed, so that the gas is prevented from flowing back.

[0059] The hydrogen mass flowmeter TU101, the nitrogen mass flowmeter TU201, the hydrogen-nitrogen mixed gas mass flowmeter TU301, the methane mass flowmeter TU401 and the air mass flowmeter TU601 are used for monitoring and controlling the mass flow of the gas, so as to ensure the stability and consistency of the test process.

[0060] According to the above ideal embodiments of the present application, the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A gas circuit system for a solid oxide cell (SOC) test bench, characterized by: The electric pile (D101) is provided with The oxygen electrode gas inlet pipeline is communicated with air, and the oxygen electrode gas inlet pipeline is provided with an oxygen electrode preheater (HP602); The hydrogen electrode gas inlet pipeline is divided into a gas inlet pipeline and a liquid water inlet pipeline, the gas inlet pipeline includes a hydrogen gas inlet pipeline, a nitrogen gas inlet pipeline, a hydrogen-nitrogen mixed gas inlet pipeline, and a methane gas inlet pipeline, and the liquid water inlet pipeline is arranged in parallel with the gas inlet pipeline; The hydrogen electrode gas inlet pipeline is divided into a gas inlet pipeline and a liquid water inlet pipeline, the gas inlet pipeline includes a hydrogen gas inlet pipeline, a nitrogen gas inlet pipeline, a hydrogen-nitrogen mixed gas inlet pipeline, and a methane gas inlet pipeline, and the liquid water inlet pipeline is arranged in parallel with the gas inlet pipeline; The hydrogen electrode gas outlet pipeline is connected with air and a waste water collecting pipeline at the gas outlet end, and the oxygen electrode gas outlet pipeline is provided with a hydrogen electrode condensate water separator (LQ101), and a steam-water separator (HQ101) is arranged on the pipeline at the gas outlet end of the hydrogen electrode condensate water separator (LQ101); The cold water machine (JEA101) is connected with the oxygen electrode condensate water separator (LQ601) and the hydrogen electrode condensate water separator (LQ101) respectively. The pipeline between the gas inlet end of the oxygen electrode gas inlet pipeline and the oxygen electrode preheater (HP602) is sequentially provided with an air filter (F601), an air pressure reducing valve (RV601), an air pressure reducing pressure gauge (PMP601), an air electromagnetic valve (S601), an air check valve (H601), an oxygen electrode cold end pressure sensor (P601), and an oxygen electrode unloading valve (HP601).

2. The gas circuit system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that The pipeline between the gas inlet end of the oxygen electrode gas inlet pipeline and the oxygen electrode preheater (HP602) is sequentially provided with an air filter (F601), an air pressure reducing valve (RV601), an air pressure reducing pressure gauge (PMP601), an air electromagnetic valve (S601), an air check valve (H601), an oxygen electrode cold end pressure sensor (P601), and an oxygen electrode unloading valve (HP601).

3. The gas circuit system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: The pipeline between the gas inlet end of the oxygen electrode gas inlet pipeline and the oxygen electrode preheater (HP602) is sequentially provided with an air filter (F601), an air pressure reducing valve (RV601), an air pressure reducing pressure gauge (PMP601), an air electromagnetic valve (S601), an air check valve (H601), an oxygen electrode cold end pressure sensor (P601), and an oxygen electrode unloading valve (HP601).

4. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: The pipeline between the gas inlet end of the oxygen electrode gas inlet pipeline and the oxygen electrode preheater (HP602) is sequentially provided with an air filter (F601), an air pressure reducing valve (RV601), an air pressure reducing pressure gauge (PMP601), an air electromagnetic valve (S601), an air check valve (H601), an oxygen electrode cold end pressure sensor (P601), and an oxygen electrode unloading valve (HP601).

5. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: ​ 6. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: The hydrogen-nitrogen mixed gas inlet pipeline is communicated with the hydrogen-nitrogen mixed gas cylinder, and a hydrogen-nitrogen mixed gas filter (F301), a hydrogen-nitrogen mixed gas pressure reducing valve (RV301), a hydrogen-nitrogen mixed gas pressure reducing pressure gauge (PMP301), a hydrogen-nitrogen mixed gas solenoid valve (S301), a hydrogen-nitrogen mixed gas check valve (H301) and a hydrogen-nitrogen mixed gas mass flowmeter (TU301) are sequentially installed on the pipeline between the hydrogen-nitrogen mixed gas cylinder and the mixing tank (HH101).

7. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: The methane inlet pipeline is communicated with the methane cylinder, and a methane filter (F401), a methane pressure reducing valve (RV401), a methane pressure reducing pressure gauge (PMP401), a methane solenoid valve (S401), a methane check valve (H401) and a methane mass flowmeter (TU401) are sequentially installed on the pipeline between the methane cylinder and the mixing tank (HH101).

8. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: A hydrogen electrode hot end inlet pressure sensor (P103) is installed on the pipeline between the electric pile (D101) and the hydrogen electrode condensate water trap (LQ101), a hydrogen electrode tail gas cooling outlet temperature sensor (T106) is installed on the pipeline between the hydrogen electrode condensate water trap (LQ101) and the steam-water separator (HQ101), one end of the steam-water separator (HQ101) is communicated with the air through a pipeline, one end of the steam-water separator (HQ101) is communicated with the waste water collecting tank (H20-101) through a pipeline, and the waste water collecting tank (H20-101) is discharged through a waste water collecting pipeline.

9. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: An oxygen electrode hot end inlet pressure sensor (P603) is installed on the pipeline between the electric pile (D101) and the oxygen electrode condensate water trap (LQ601), and an oxygen electrode tail gas cooling outlet temperature sensor (T603) is installed on the exhaust pipeline of the oxygen electrode condensate water trap (LQ601).

10. The gas path system for a solid oxide cell (SOC) test bench according to claim 1, characterized in that: A hydrogen electrode cold end pressure sensor (P101) is installed on the pipeline connected between the mixing tank (HH101) and the inlet pipeline, and the pipeline between the mixing tank (HH101) and the hydrogen electrode cold end pressure sensor (P101) is connected with the hydrogen electrode outlet pipeline through a pipeline, and a hydrogen electrode unloading valve (HP101) is installed on the pipeline.

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